My key fob only works when very close to the vehicle (within 10ft, usually less). I understand that the first thing to check is the antenna amplifier fuse, but I can't seem to locate it. There are three fuse boxes on the '98 e320 - one under the hood, one on the driver-side dash, and one under the rear seat. The closest I can find is "Central Locking System" which supposedly includes fuses 1,4,5,19,(16,41). 16 and 41 are under the hood. I checked all of these, and none of them are blown. Any ideas/similar issues? Thanks!